Folding ironing board



Nov. 24, 1964 E. SMITH 3,158,112

FOLDING IRONING BOARD Filed March 26, 1963 2 Sheets-Sheet 1 INVENTOR.

Eugene Sm [#2 BY RM W Affomey Nov. 24, 1964 E. SMITH 3,158,112

FOLDING IRONING BOARD Filed March 26, 1963 2 Sheets-Sheet 2 I y W yINVENTOR.

BY Eugene 5/77/7/2 Rah/d: 5,

A l/omey United States Patent 3,158,112 FDLDENG IRQNENG BQARD EugeneSmith, Long Beach, N.Y., assignor to Qahill Metals Corporation, NewYork, N.Y., a corporation of New York Filed Mar. 26, 1963, Ser. No.268,035 8 Claims. (Q1. 1 3S-36) This invention relates to ironingboards, and in particular to ironing board structures that can be foldedor collapsed when not in use.

An ordinary household ironing board comprises an elongate, horizontallydisposed ironing table supported by legs at a suitable working heightabove the floor. In a conventional ironing board structure, the legs maybe collapsible to some extent, but the board nevertheless remains abulky and cumbersome object requiring substantial storage space. Suchstructure cannot conveniently be carried by travelers, as for use inironing or pressing garments during the course of travel. The large sizeof the board is also an inconvenience in circumstances where availablestorage space is limited.

These difficulties can be obviated by provision of an ironing boardstructure in which the ironing table as well as the legs can becollapsed into a small, compact, readily portable unit. A board of thistype should be easily foldable and in particular should be mechanicallysimple, both for convenience of the user and for economy of manufacture.At the same time, to constitute a useful ironing table, it should opento full ironing board size and must be rigid and structurally stablewhen thus open; that is to say, it must be able to Withstand theordinary pressures and stresses incident to ironing without tending tocollapse.

A primary object of the present invention is to provide a structurallysimple, portable ironing board which folds easily into a compact unit ofsmall size and opens to constitute a stable, rigid, full sized ironingtable.

Another and particular object is to provide such ironing board structurehaving foldable legs which are substantially incapable of accidentalcollapse when in open position.

Further objects and advantages of the invention will be apparent fromthe detailed description hereinbelow set forth, together with theaccompanying drawings, wherein:

FIG. 1 is a perspective view of an ironing board struc ture embodyingthe present invention in a particular form;

FIG. 2 is an elevational cross-sectional view taken along the plane 2?.of FIG. 1;

FIG. 3 is a fragmentary perspective view illustrating, in explodedrelation, certain details of the leg structure of the board of FIG. 1;

FIG. 4 is a side view or" one leg of the board of FIG. 1, in foldedposition;

FIG. 5 is a sectional view taken along the plane 55 of FIG. 4;

FIG. 6 is a plan view of the underside of the center section of theboard of FIG. 1, showing the arrangement of the legs in folded position;

FIG. 7 is a side elevational view of the board of FIG. 1 in foldedposition;

FIG. 8 is an elevational view of one hinge plate of the board of FIG. 1;and

FIG. 9 is a sectional view taken as along the plane 9-9 of FIG. 8.

Referring to the drawings, the invention in its illustrated embodimentis arranged to provide an ironing table or board of conventionaldimensions and configuration, as shown in FIG. 1. This table comprises acenter section it), a first wing section 11 tapered to constitute thenose of the ironing table, and a second wing-sec- 3,158,112 PatentedNov. 24, 1964 "ice tion 12, all conveniently fabricated of sheet metalor like light-weight, rigid material. The wings 11, 12 are hingedlyconnected to the opposite extremities of the center section and (asindicated in FIG. 7) are arranged to fold in overlapping relation abovethe center section when the board is collapsed.

The center section 10 is shown as having parallel, downwardly extendingside flanges 14, which contribute to the structural rigidity of thissection. The end of the wing 11 abutting the center section also bearsdownwardly extending parallel side flange portions 16; in addition, asillustrated in FIG. 2, this end of the wing 11 is shaped to provide anoffset extension 17 which projects beneath the center section to engagethe underside of the latter when the wing is in open position. The wing12 has a similarly arranged offset extension 19 and side flange portions20 at its end adjacent the center section. Metal clips 22 may be mountedon the underside of the center section to engage these offset extensions17, 19. As will be understood, when the board is open the latterextensions, abutting the underside of the center section, aid inmaintaining the respective wings in rigid, coplanar relation to thecenter section.

The wing 12 is shown as connected to the center section by hinge plates25 respectively extending between the adjacent side flanges of the wingand center section on opposite sides of the board. Each of these hingeplates 25, as shown in FIGS. 8 and 9, has a central slot 26 providing ashort upper track 26a and an elongated lower track 2612, and is movablymounted on a pair of rivets 27 which are respectively aifixed to theadjacent side flanges 14, it? of the center section 10 and wing 12. Therivets 27 extend through the slot 26 and have enlarged heads adapted toengage the outer surface of the hinge plate so as to hold the plateagainst the flanges 14, 211?. As hereinafter explained, this hinge platearrangement permits upward rotation of the wing 12 from the openposition of FIG. 1 to the folded position of FIG. 7, in which this winglies immediately above and parallel to the center section. The wing 11is connected to the center section by similar hinge plates 28, mountedon rivets 29 in the same manner as the hinge plates 25, and arranged anddimensioned to enable the wing 11 to rotate upwardly to a foldedposition directly above and parallel to the wing 12, as shown in FIG. 7.

To support the board in open position, a pair of legs 30, 31 is mountedon the underside of the center section 111 adjacent the wing 11, and asecond pair of legs 33, 34 is mounted on the underside of the centersection adjacent the wing 12. Each pair of legs when open extendsdownwardly from the center section 10, and also outwardly from thecenter section in the direction of the adjacent wing, to provide a broadbase of support for the board. The overall dimension of the legs is suchas to support the ironing table in horizontal position at a convenientworking height.

These four legs are essentially identical in construction, and hencetheir structure may be sufliciently described by detailed considerationof the leg 3%, shown in FIGS. 2 5. The latter leg comprises an upperchannel member 36 and a lower channel member 37. At its upper extremity,the member 35 is pivotally mounted in a downwardlyopening U-shapedbracket 39, which i fixed to the underside of the center section 10 andoriented to permit rotation of this member in a vertical plane parallelto the long axis of the ironing board. In folded position the member 36lies beneath and parallel to the underside of the center section 10,with the channel of the member opening toward the center section. Theupper extremity of the member 36 is shaped to permit rotation of themember through an angle of more than from the latter folded position toan open position in which it extends downwardly and outwardly from thecenter section, viz. in the direction of the wing 11.

The lower channel member 37 i narrower than the upper member 36, so thatit may be folded into the channel of the upper member. As shown in FIGS.23, this lower member terminates at its upper extremity in upwardlyextending side flanges 41, 42, which are pivotally mounted (as by a pin43) in the upper member 36 adjacent the lower end thereof to permitrotation of the member 37 into and out of the channel of the member 36.It will be appreciated that this rotation occurs in the same plane asthe aforementioned rotation of the member 36. Thus in folded position,the member 37 lies substantially entirely within the upper member 36, asshown in FIGS. 4-5, with the lower extremity of the member 37 directedtoward the upper end of the member 36. In opening the leg, the member 37is rotated downwardly and forwardly from the last-mentioned positionuntil the upper front edge 4-4 of this member 37 abuts the lower frontedge 15 of the member 36, preventing further rotation.

In open position, therefore, the lower member 37 extends downwardly andoutwardly from the member 36, and the latter member bears upon the upperfront edge 44 of this lower member, as shown in FIG. 2. As a particularfeature of the invention, this upper front edge 44 is offset, withrespect to the position of the pivot pin 43, in such manner that themember 37 rotates through more than 90 from its folded position beforethe edge 44 abuts the lower edge 45 of the member 36. Consequently, inopen position the lower member 37 is bent slightly outward in relationto the upper member 36, instead of being aligned with the latter member.

Because of this offset leg arrangement, which is identical for all fourof the legs 30, 31, 33, 3d, the legs in extended position are positivelyrestrained from accidental collapse. Thus, for example (referring againto the leg 36), an outwardly-directed longitudinal thrust along theironing table in the direction of the wing 11 does not tend to causerotation of the lower member 37 toward closed position, as it might ifthe member 37 in open position were aligned with the member 36, andhence the leg joint between the two members cannot exhibit any tendencyto buckle outwardly. For this reason, the two-piece legs of the presentstructure, while readily foldable into the compact closed position shownin FIG. 4, are comparable in stability and rigidity to a single-pieceleg when open.

The leg 36 described above and the corresponding leg 31 (also pivotallymounted in a U-shaped bracket designated 48 in FIG. 6, at the end of thecenter section 16 adjacent the wing 11) are arranged to form a-pair oflegs with respectively parallel upper and lower members. To preventlateral spreading of the legs 36, 31 when open, a cross piece may beconnected between the front .surfaces of the respective lower members ofthese legs. A yoke brace 52, conveniently in the form of a U-shapedmetal bar, is pivotally mounted at its extremities on the respectivelegs .36, 31, and extends diagonally upward and outward therefrom inopen position to engage the underside of the wing 11, e.g. being held bya springmetal clip 53 mounted on the underside of this wing, Asindicated in FIG. 2, the yoke brace may be connected to the inner sideof the leg 30 by the pivot pin 43 adjacent the joint of the upper andlower .iembers, and to the inner side of the leg 31 by the correspondingpivot pin in the latter leg. This yoke brace serves to support the wing11 when the board is open so as to maintain the latter in rigid coplanarrelation to the center section 10.

The pair of legs 33, 34 at the opposite end of the center section lltlare arranged in the same manner as the legs 30, 31, being pivotallymounted on the underside of the center section in U-shaped bracketsrespectively designated 55, 56 in FIG. 6, for rotation to an openposition extending downwardly and outwardly toward the wing 12. A crosspiece 57 (analogous to the cross piece 56) extends i open position.

between the front surfaces of the lower members of these legs 33, 34. Inaddition, a U-shaped yoke brace 59 (corresponding to the yoke brace 52)is pivotally mounted at its extremities on the respective legs 33, 34,and in open position extends diagonally upward therefrom to engage theunderside of the wing 12, for support of the latter wing, e.g. beingheld by a spring-metal clip 66 provided on the underside of such wing.

As a further stabilizing feature, the board structure may also veryadvantageously include a foldable spreader brace 62, which in openposition extends between the respective pairs of legs 3%, 3i and 33, 34to aid in maintaining these pairs of legs in rigid, downwardly divergingrelation. The brace 62 in the form shown-comprises a first channelmember 63 pivotally mounted in a bracket on the cross-piece 5i)intermediate the lower members of the pair of legs 36, 31; a secondchannel member 65, dimensioned and arranged to fold within the channelof the member 63, being pivotally mounted in the outer extremity of themember 63 as by a pin 66; and a third channel member 67, dimensioned andarranged to fold within the channel of the member 65, being pivotallymounted in the outer extremity of the member 65 as by a pin 68. Themember 67 bears at its outer extremity a hook 65 which is adapted toengage a bracket 70 mounted on the cross-piece 57 intermediate the lowermembers of the pair of legs 33, 34.

When the brace 62 is open, as shown in FIGS. 1 and 2, the front edge 71of the member 65 (the edge adjacent the pivot pin 66) abuts the outerfront edge 72 of the member 63, and the front edge 73 of the member 67(adjacent the pin 68) abuts the outer front edge '74 of the member 65.The edge 71 is off-set with respect to the position of the pin 66, andthe edge 73 is similarly off-set with respect to the pin 68, so that themembers 65, 67 each rotate through an angle of more than Ge. about therespective pivot pins 66, 68) from folded position to Specifically, as aresult of this off-set arrangement, the member 65 lies flat along thefloor when the brace 62 is open, providing an additional point ofsupport for the ironing board, while the members 63, 67 extenddiagonally upward from the opposite ends of the member 65 to therespective leg cross-pieces 50, 57. In addition, the off-set arrangementof the brace members prevents the brace from accidentally buckling orcollapsing when open. 7

Thus in open position (with the hook 69 engaging the bracket 70) thebrace 62 constitutes an effectively rigid structure, extending betweenthe pair of legs 30, 31 and the pair of legs 33, 34 and thereby opposingany tendency of these pairs of legs to fold inwardly toward each other.At the same time, the brace is readily collapsible into a compact unit,the member 67 folding into the channel of the member 65, the member 65in turn folding into the channel of the member 63, and the latter memberbeing pivotally movable to a position in which it lies between andparallel to the lower members of the leg pair 30, 31.

As shown more particularly in FIG. 6, the legs 33, 34 providing the pairadjacent the wing 12 are spaced in equidistant relation to the long axisof the board. The

pair of legs 39, 31 are also spaced in equidistant relation to thelatter axis, but the distance between the respective outer sides of thelegs 36, 31 is smaller than the distance between the respective innersides of the legs 33, 34.

Thus when the legs are in closed position, the folded legs 30, 31 nestlebetween the folded legs 33, 34 beneath the underside of the centersection 10.

The manner in which the board is folded from the open position shown inFIG. 1 to the closed position shown in FIGS. 6 and 7 will now be readilyapparent. The wings 12, 11 areiirst successively folded over the centersection 10 to lie in overlapping relation above the latter section. Themanner in which this is effected may be explained with reference to themovement of the wing 12. As indicated in FIGS. 1, 8 and 9, when the wingis in open position each of the hinge plates 25 seats by gravity on therivets 27 with the rivets positioned at the outer extremities of theshort upper track 26a, effectively locking the wing against the centersection. To fold the wing, each of the hinge plates 25 is lifted, sothat the rivets seat in the elongated lower track 2612; the wing is thenpulled horizontally outward from the center section, disengaging thewing extension 19 from the clips 22, and moving the rivets 27 to theouter extremities of the elongated track 26b. Such outward movement,increasing the distance between the rivets, provides clearance for thewing to enable it to be rotated upwardly until it rests above the centersection in the folded position shown in FIG. 7. Folding of the wing 11is then accomplished by a similar operation.

With the wings thus folded, the spreader brace 62 is disengaged from thebracket 70 and collapsed to lie between the lower members of the legs30, 31. The lower members of the legs 33, 34 are then folded into therespective upper members of the latter legs, so that they liesubstantially entirely within these upper members, with the cross piece57 extending between them and behind the rearward edges of the latterupper members. The upper members of the legs 33, 34 are in turn rotatedinwardly and upwardly to lie closely beneath and parallel to theunderside of the center section 19, with the cross piece 57 immediatelyadjacent the underside of this center section. Thereafter the yoke brace59 is rotated to a position in which it lies between and parallel to thefolded legs 33, 34.

The lower members of the legs 30, 31 are subsequently rotated inwardlyand upwardly into the upper members of these latter legs, and such uppermembers are rotated to a position, beneath the underside of the centersection 10, between the arms of the yoke brace 59 and parallel to thelegs 33, 34, the cross piece 50 then lying immediately adjacent theunderside of the center section and the spreader brace 62 lying betweenthe legs 30, 31 and parallel thereto. Finally the yoke brace 52 isrotated to a position between and parallel to the legs 30, 31.

In such folded position (shown in FIG. 6) the legs, spreader brace, andyoke braces nestle compactly, in mutually coplanar relation, beneath thecenter section (which extends beyond them in all direction) in therecess defined by the side flanges 14. One or both of the yoke braces52, 59 may if desired be engaged by spring-metal clips 77, 78 mounted onthe underside of the center section, to positively secure them fromunfolding. The folded board, as shown in FIG. 7, is compact, desirablysmall in size and readily portable. For convenience in carrying, it maybe provided with a handle 80 mounted on one of the side flanges 14 ofthe center section 10.

To open the board, the procedures described above are reversed; that isto say, the yoke brace 52, and the upper members and lower members ofthe leg pair 30, 31 are sequentially rotated to open position, followedin order by the yoke brace 59 and the upper and lower members of the legpair 33, 34, until all four legs are extended in the manner shown inFIG. 1. The spreader brace 62 is unfolded and hooked to the bracket 70on the cross-piece 57. Then, by applying foot pressure to the bracemember 65, the brace 62 may be fully opened (i.e. so that the member 65lies flat along the floor); as it is thus opened, the bracesimultaneously exerts a transverse outward pressure on the pairs of legs30, 31 and 33, 34, spreading the legs to effect full outward extensionof the legs. The wings 11, 12 are then successively moved to openposition. Finally the yoke braces 52, 59 are adjusted in position toengage the spring clips 53, 60 on the undersides of these respectivewings. As thus opened, the center section 10 and wings 11, 12 provide arigid ironing-table, the wings being supported in coplanar relation tothe center section by the yoke braces 52, 53; while the leg pairs 30, 31and 33, 34 afford stable support for the table, being effectivelyincapable of accidental collapse, and

fully sturdy enough to withstand the stresses and pressures incident toironing.

It is to be understood that the invention is not limited to the featuresand embodiments herein specifically set forth, but may be carried out inother ways without departure from its spirit.

I claim:

1. In a folding ironing board, in combination, first and second tablesections, hinge means connecting said first and second table sections inendwise relation, an upper leg member having a lower end portion and alongitudinal channel, and a lower leg member dimensioned to fit withinsaid channel, said upper leg member further having an upper end portionpivotally mounted on the underside of said first table section forrotation through an angle greater than between a position in which saidupper member underlies said first section parallel thereto with saidchannel opening toward said first section and a position in which saidupper member extends diagonally downwardly therefrom in the direction ofsaid second section, and said lower member having an upper end portionpivotally mounted in the lower end portion of said upper member forrotation through an angle greater than 90 between a position in whichsaid lower member lies within the channel of said upper member and aposition in which said lower member extends diagonally downward fromsaid upper member in the direction of said second section.

2. In a folding ironing board, in combination, first and second tablesections, hinge means connecting said first and second table sections inendwise relation, an. upper leg member having a longitudinal channel anda lower end portion including a lower front edge surface, and a lowerleg member dimensioned to fit within the channel of said upper member,said upper member further having an upper end portion pivotally mountedon the underside of said first table section for rotation through anangle greater than 90 between a position in which said upper memberunderlies said first section parallel thereto with said channel openingtoward said first section and a position in which said upper memberextends diagonally downward therefrom in the direction of said secondsection, said lower member having an upper extremity including a pivotalmounting connecting said lower member in said lower end portion of saidupper member for downward rotation from a folded position in which saidlower member lies within the channel of said upper member, and saidlower member further having an upper front edge portion positioned inoffset relation to said last-mentioned pivotal mounting for engagementwith said lower front edge portion of said upper member when said lowermember is in a downward position angularly displaced from said foldedposition by more than 90.

3. In a folding ironing board, in combination, first and second tablesections, hinge means providing endwise connection of said first andsecond table sections and arranged to permit angular displacement ofsaid second section from a position coplanar with said first section toa position overlapping said first section, a pair of folding legsextensible downwardly and outwardly from said first section in thedirection of said second section, and a brace member pivotally mountedto said pair of legs and extensible diagonally upward therefrom toengage the underside of said second section for support thereof whensaid pair of legs is in extended position, each of said legs comprisingan upper leg member having a longitudinal channel and a lower endportion including a lower front edge surface, and a lower leg memberdimensioned to fit within the channel of said upper member, said uppermember further having an upper end portion pivotally mounted on theunderside of said first table section for rotation through an anglegreater than 90 between a position in which said upper member underliessaid first section parallel thereto with said channel opening towardsaid first section and a position in which said upper member extendsdiagonally downward therefrom in the direction of said second section,said lower member havin an upper extremity including a pivotal mountingconnecting said lower member in said lower end portion of said uppermember for downward rotation from a folded position in which said lowermember lies within the channel of said upper member, and said lowermember further having an upper front edge portion positioned in offsetrelation to said last-mentioned pivotal mounting for engagement withsaid lower front edge portion of said upper member when said lowermember is in a downward position angularly displaced from said foldedposition by more than 90.

4. A folding ironing board, comprising, in combination, a e ter able seon, fi s a d se d ins t le sections, first and second hinge meansrespectively providing endwise connection of said first and second wingsections to said center section at opposite ends of said center sectionand respectively arranged to permit folding of said first and secondwing sections in overlapping relation above said center section, firstand second pairs of folding legs respectively extensible downwardly andoutwardly from said center section in the direction of said first andsecond wing sections, and first and second brace members respectivelypivotally mounted to said first and second pairs of legs and extensiblediagonally upward therefrom to engage the underside of said first andsecond wing sections respectively for support thereof when said firstand second pairs of legs are in extended position, said first and secondwing sections having lower surface portions engageable with said firstand second brace members respectively, each of said legs comprising anupper leg member having a longitudinal channel and a lower end portionincluding a lower front edge surface, s

and a lower leg member dimensioned to fit within the channel of saidupper member, said upper member further having an upper end portionpivotally mounted on the underside of said ,center section for rotationthrough an angle greater than 90 between a position in which said uppermember underlies said center section parallel thereto with said channelopening toward said center section and a position in which said uppermember extends diagonally downward therefrom, said lower member havingan upper extremity including a pivotal mounting connecting said lowermember in said lower end portion of said upper member for downwardrotation from a folded position in which said lower member lies withinthe channel of said upper member, said lower member further having anupper front edge portion positioned in offset relation to saidlast-mentioned pivotal mounting for engagement with said lower frontedge portion of said upper member when said lower member is in ,adownward position angu-larly displaced from said folded position by morethan 90, and the upper members of said first and second pairs of foldinglegs being mutually disposed on the underside of said center section insuch manner that when said upper members are in position underlying saidcenter section the upper members of said second pair of legs lieintermediate and parallel to the upper members of said first pair oflegs.

5. Structure as defined in claim 4, including spreader brace meanspivotallyconnected to the lower members of one of said pairs of foldinglegs, said spreader brace means being foldable to a positionsubstantially coplanar and coextensive with said last-mentioned lowermembers and being extensible in open position to engage the lowermembers of the other of said pairs of folding legs to provideeifectively rigid connection between said first and second pairs offolding legs securing said pairs of legs against inward displacementrelative to each other,

6, Structure as defined in claim 5, wherein said spreader brace meanscomprises a plurality of rigid members, arranged in end-to-end pivotalconnection to each other for folding to a length substantially equal tothe length of one of said rigid members and openings to an extendedposition connecting said first and second pairs of folding legs, andwherein, in said extended position, a lower edge portion of one of saidrigid members lies in coplanar relation with the downward extremities ofsaid pairs of folding legs.

7. Structure as defined in claim 4, including first and secondcross-members respectively extending between the lower members of saidfirst and second pairs of folding legs, and spreader brace meansextensible .to provide eifectively rigid connection between said firstand second crossmembers securing said first and second pairs of legsagainst inward displacement relative to each other, said spreader bracemeans comprising a first brace member pivotally mounted on said secondcross-member and having a longitudinal channel, a second brace memberpivotally mounted in the channel of said first brace member anddimensional to fit therein and having a longitudinal channel, and athird bnace member pivotally mounted in the channel .of said secondbrace member and dimensioned to fit therein and hearing at its outerextremity means engageable with said first cross-member, said firstcrossmember having a portionadapted for positive engagement with saidengageable means, said brace members being foldable to a positionsubstantially coplanar and coextensive with the lower members of saidsecond pair of folding legs, and said brace members being furtherpositioned and arranged such that in open position said brace membersare axially off-set relative to each other, with the channels of saidbrace members opening downwardly and a lower edge portion of said secondbrace member lying in coplanar relation with the downward extremities ofsaid pairs of folding legs.

8. Structure as defined in claim 4, wherein said first and second wingtable sections have integral offset extensions respectively disposed atthe ends of said wing sections adjacent said center section forengagement with the underside of said center section when said first andsecond wing sections are in open position.

llileferences Cited in the file of this patent UNITED STATES PATENTS1,115,731 Owens Nov. 3, 1914 2,609,628 Toth Sept. 9, 1952 2,651,861 WoodSept. 15, 1953 FOREIGN PATENTS 803,556 Germany Apr. 5, 1951 825,102Great Britain Dec. 9, 1959 837,742 Great Britain June 15, 1960 1,204,992France Ian.'2 9, 1960

1. IN A FOLDING IRONING BOARD, IN COMBINATION, FIRST AND SECOND TABLESECTIONS, HINGE MEANS CONNECTING SAID FIRST AND SECOND TABLE SECTIONS INENDWISE RELATION, AN UPPER LEG MEMBER HAVING A LOWER END PORTION AND ALONGITUDINAL CHANNEL, AND A LOWER LEG MEMBER DIMENSIONED TO FIT WITHINSAID CHANNEL, SAID UPPER LEG MEMBER FURTHER HAVING AN UPPER END PORTIONPIVOTALLY MOUNTED ON THE UNDERSIDE OF SAID FIRST TABLE SECTION FORROTATION THROUGH AN ANGLE GREATER THAN 90* BETWEEN A POSITION IN WHICHSAID UPPER MEMBER UNDERLIES SAID FIRST SECTION PARALLEL THERETO WITHSAID CHANNEL OPENING TOWARD SAID FIRST SECTION AND A POSITION IN WHICHSAID UPPER MEMBER EXTENDS DIAGONALLY DOWNWARDLY THEREFROM IN THEDIRECTION OF SAID SECOND SECTION, AND SAID LOWER MEMBER HAVING AN UPPEREND PORTION PIVOTALLY MOUNTED IN THE LOWER END PORTION OF SAID UPPERMEMBER FOR ROTATION THROUGH AN ANGLE GREATER THAN 90* BETWEEN A POSITIONIN WHICH SAID LOWER MEMBER LIES WITHIN THE CHANNEL OF SAID UPPER MEMBERAND A POSITION IN WHICH SAID LOWER MEMBER EXTENDS DIAGONALLY DOWNWARDFROM SAID UPPER MEMBER IN THE DIRECTION OF SAID SECOND SECTION.